KDZD300A cable outer sheath loop current grounding tester is applicable to the following specific measurement scenarios:
Detection of substation cable grounding system
Measure the circulating current of the metal sheath of high-voltage cable (such as aluminum sheath and copper shielding layer) in the single-end or cross interconnection grounding mode, and judge whether there are multipoint grounding, insulation damage or poor grounding faults.
Plant service power and transmission cable monitoring
Regular patrol inspection shall be carried out for the grounding current of the outer sheath of the power cable at the outlet of the generator, the low voltage side of the main transformer and the plant power distribution system to prevent cable overheating, insulation aging and other problems caused by large loop flow.
Operation and maintenance of urban underground cable tunnel/pipe gallery
Quickly detect the outer sheath grounding current and harmonic components of densely laid cables without interrupting the power supply, and evaluate cable operation and grounding system integrity.
Cable line fault diagnosis and preventive test
By measuring the circulating current, harmonic content (maximum 25 times), total harmonic distortion rate (THD) and other parameters, it can help judge the insulation deterioration of cable sheath, abnormal induced voltage or abnormal grounding circuit.
Analysis of harmonic interference
In places with nonlinear load (such as frequency converter and rectifier equipment), detect harmonic and inter-harmonic current in cable grounding circuit and evaluate its impact on system safety.
Leakage current and frequency monitoring
It is used to troubleshoot the leakage current to the ground caused by the damage of cable outer sheath, and monitor the system frequency stability (20Hz~400Hz wide frequency range, power frequency 45~65Hz high accuracy).
With non-contact, high anti-interference, portable and durable characteristics, the equipment is especially suitable for power operation and maintenance personnel to carry out fast, safe and accurate live detection and state evaluation on site.
The complete set of test equipment for KDCJ-1800kV/180kJ impulse voltage generator is suitable for the following specific test scenarios:
1. High voltage insulator impact withstand voltage test
Conduct lightning impulse full wave (1.2/50 μ s) and operational impulse (250/2500 μ s) withstand tests on ceramic insulators, composite insulators, etc. to verify their insulation performance under overvoltage, in compliance with JB/T 7616 and DL/T 557 standards.
2. Impact test for bushings (such as transformer bushings and wall bushings)
Simulate the impact of lightning or overvoltage on the external insulation and internal structure of the casing, and evaluate whether flashover or breakdown will occur.
3. Impulse test of current/voltage transformers
According to the requirements of GB/T 7449, conduct lightning impulse test on the transformer to verify the reliability of its main insulation and inter turn insulation.
4. Type testing of power transformers and reactors
During the research and development or manufacturing stage, conduct lightning impulse tests on large transformers to verify the insulation strength of windings to ground and between phases.
5. Verification of GIS (gas insulated switchgear) and high-voltage switch components
Perform impulse voltage tests on insulation supports, isolation fractures, and other components in GIS to ensure safe operation under extreme overvoltage conditions.
6. Standard tests of scientific research and certification testing institutions
Used for conducting authoritative testing in high-voltage laboratories that comply with national standards such as GB/T 16927 and GB/T 311, supporting product type testing, sampling, or international certification (such as IEC benchmarking).
✅ This equipment is particularly suitable for use in indoor high-voltage testing halls, and can operate continuously to meet the full chain high-voltage testing needs from product development, factory quality inspection to third-party certification.
This high-voltage switch comprehensive testing equipment can be widely used in the following typical scenarios:
1. Substation operation and maintenance
Conduct preventive tests or fault diagnosis on SF6 circuit breakers, vacuum switches, GIS, etc. in operation, quickly evaluate mechanical performance and contact status of contacts, and ensure the safety of the power grid.
2. Manufacturing and factory testing of high-voltage switches
In the production line or quality inspection process, full parameter testing is conducted on various types of circuit breakers (including graphite contacts, special structures with closing resistors, etc.) to ensure that the products comply with national standards and industry specifications.
3. Installation and commissioning of power engineering
In the construction or renovation of substation projects, perform functional verification on newly installed high-voltage switchgear before commissioning, including low voltage operation tests, synchronization tests, etc.
4. Electric power research and third-party testing institutions
Used for type testing, technical research, or certification testing, supporting high-precision data acquisition, waveform analysis, and report generation to meet the needs of professional laboratories.
5. Power distribution systems for large industrial and mining enterprises and self owned power plants
Regularly inspect internal high-voltage distribution equipment to promptly detect potential hazards such as contact wear, mechanism jamming, and abnormal circuit resistance, in order to avoid sudden power outages.
✅ The equipment can be used in conventional industrial environments with temperatures ranging from -10 ℃ to 40 ℃ and humidity ≤ 80% RH. It has excellent resistance to electromagnetic interference and can stably and accurately measure even in 500kV live substations, truly achieving "one operation, comprehensive diagnosis".
This high-voltage switch comprehensive testing system is mainly suitable for the following typical application scenarios:
1. Maintenance of power system substations
Conduct regular or post fault mechanical characteristic and circuit resistance tests on SF6 circuit breakers, vacuum switches, GIS combination devices, etc. in operation to ensure reliable opening and closing.
2. Factory inspection of high-voltage switch manufacturers
Used for full parameter quality inspection of various circuit breakers (vacuum, SF6, oil switches, etc.) on production lines, verifying whether the action time, speed, stroke, contact resistance, etc. meet the standards.
3. Installation and commissioning site of power engineering
In the construction of new substations or power grid renovation projects, perform functional verification and low voltage operation tests on newly installed high-voltage switchgear before commissioning.
4. Electric power research and testing institutions
Conduct performance research, type testing, or third-party certification testing on switchgear, and support high-precision data acquisition and waveform analysis.
5. Maintenance of power distribution systems in power plants and large industrial and mining enterprises
Conduct preventive tests on circuit breakers in self owned power plants or industrial high-voltage distribution cabinets to detect potential hazards such as mechanical jamming, contact wear, and poor circuit contact in advance.
✅ The equipment can work stably in a conventional industrial environment with a temperature range of -10 ℃ to 40 ℃ and a humidity of ≤ 80% RH. It has strong anti-interference ability and can accurately measure even near a 500kV live substation, meeting the testing needs of the entire life cycle from manufacturing, installation to operation and maintenance.
The PD Patrol Tester is suitable for the following typical application scenarios and environments:
Substation and distribution room
Conduct live patrol inspection on switch cabinet and GIS composite apparatus in operation without power failure.
Power maintenance and operation&maintenance site
It is used for periodic partial discharge detection of transformer, cable terminal, busbar and other equipment, so as to discover potential insulation hazards in time.
Power equipment manufacturer
The high voltage equipment shall be subject to partial discharge test before delivery to ensure that the product quality meets the standards.
Rail transit and industrial plant area
Detect partial discharge in traction substation and HV distribution system to ensure power supply safety.
Laboratory and Testing Agency
Carry out partial discharge mechanism research, equipment performance verification or third-party inspection and certification.
✅ The equipment can work stably in the conventional industrial or outdoor environment of - 20 ℃ - 50 ℃ and humidity of 10% - 90% (non-condensing). It is light and portable (only 0.85kg) and suitable for mobile inspection and on-site fast diagnosis.
The torsion tester is applicable to the reliability test environment of optical cables, electric wires and cables, communication wires and flexible electronic products, and widely used in:
Cable manufacturer: detect the structural integrity and signal stability of the product under repeated torsion;
Communication equipment laboratory: evaluate the transmission attenuation change of optical fiber under mechanical stress;
Quality inspection and certification organization: carry out torsion resistance verification according to GB/T 7424.2 E7 standard;
R&D and Quality Control Department: simulate the bending scene in actual use and optimize the material and structure design.
Stable operation in normal temperature and humidity industrial or laboratory environment, meeting the requirements of full chain test from R&D to production.
With its high temperature stability, uniform air supply and rugged construction, this high temperature blast oven is suitable for the following specific industrial scenarios:
Manufacturing of electronic components
It is used for drying, aging test and stress screening of PCB, capacitor, resistor and other components.
Hardware plating and surface treatment
Quick drying of workpieces after electroplating, preventing water stain oxidation and improving coating adhesion.
Plastics and mould industry
Pre-dried pellets (e.g. ABS, PC and other hygroscopic materials) to avoid blisters or imperfections during injection molding.
Laboratory and Quality Inspection Center
Material thermostatic drying, moisture determination, heat treatment test and sample pretreatment.
Production of auto parts
Curing, drying or heat resistance test of brake pad, sensor and harness.
Manufacturing of new energy (lithium battery)
The battery pole piece and diaphragm shall be dried before vacuum or under normal pressure to ensure that the moisture content meets the standard.
Disposal of food and pharmaceutical packaging materials
Dehumidification and sterilization auxiliary drying of packaging bottle, aluminum foil and composite film before filling (cleaning requirements shall be met).
✅ Its horizontal forced air supply+high uniformity is especially suitable for placing multi-layer samples or process links with high requirements for temperature consistency.
This product is applicable to power system, high and low voltage switchgear, electrical equipment manufacturing, rail transit, new energy power station and other industrial scenes. It can conduct high-precision contact resistance detection for switches, circuit breakers, cable joints, welding seams, etc. in the normal workshop or site environment with - 10 ℃ - 40 ℃ and humidity<80% RH.
